package pri.ydy.eduService.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import pri.ydy.eduService.entity.EduSubject;
import pri.ydy.eduService.entity.excel.SubjectData;
import pri.ydy.eduService.service.EduSubjectService;
import pri.ydy.serviceBase.exceptionhandler.GuliException;

/**
 * @author Ydy
 * @date 2020/10/5 - 14:02
 */
public class SubjectExcelListen extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListen不能交给spring进行管理，需要自己new，不能自动注入其他对象
    //不能实现数据集操作
    public EduSubjectService subjectService;

    public SubjectExcelListen(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }
    public SubjectExcelListen(){}

    //读取Excel中内容，一行一行进行读取
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if (subjectData==null){
            throw new GuliException(20001,"文件数据为空");
        }
        //一行一行读取，每次读取有两个值，第一个值是一级分类，第二个值是二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject=this.existOneSubject(subjectService,subjectData.getOneSubjectName());
        if(existOneSubject==null){//没有相同一级分类，进行添加
            existOneSubject=new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            //调用save方法进行添加,添加完成后mp自动生成id值
            subjectService.save(existOneSubject);
        }

        //取一级分类的Id值
        String pid=existOneSubject.getId();
        //添加二级分类
        //判断二级分类是否重复
        EduSubject existTwoSubject=this.existTwoSubject(subjectService,subjectData.getTwoSubjectName(),pid);
        if(existTwoSubject==null){
            existTwoSubject=new EduSubject();
            existTwoSubject.setParentId(pid);
            existTwoSubject.setTitle(subjectData.getTwoSubjectName());
            subjectService.save(existTwoSubject);
        }

    }

    //判断一级分类不能重复
    private EduSubject existOneSubject(EduSubjectService subjectService,String name){
        //wrapper条件对象
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject oneSubject=subjectService.getOne(wrapper);
        return oneSubject;
    }

    //判断二级分类不能重复
    private EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper=new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject=subjectService.getOne(wrapper);
        return twoSubject;
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
